174 lines
4.6 KiB
C
174 lines
4.6 KiB
C
/*
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* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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* Copyright (c) 2002-2008 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* $Id: ar5416_power.c,v 1.6 2008/11/11 00:11:30 sam Exp $
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*/
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#include "opt_ah.h"
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#include "ah.h"
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#include "ah_internal.h"
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#include "ar5416/ar5416.h"
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#include "ar5416/ar5416reg.h"
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/*
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* Notify Power Mgt is enabled in self-generated frames.
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* If requested, force chip awake.
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*
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* Returns A_OK if chip is awake or successfully forced awake.
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*
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* WARNING WARNING WARNING
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* There is a problem with the chip where sometimes it will not wake up.
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*/
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static HAL_BOOL
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ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip)
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{
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#define POWER_UP_TIME 200000
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uint32_t val;
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int i = 0;
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if (setChip) {
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/*
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* Do a Power-On-Reset if OWL is shutdown
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* the NetBSD driver power-cycles the Cardbus slot
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* as part of the reset procedure.
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*/
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if ((OS_REG_READ(ah, AR_RTC_STATUS)
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& AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) {
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if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON))
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goto bad;
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}
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OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
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OS_DELAY(50); /* Give chip the chance to awake */
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for (i = POWER_UP_TIME / 50; i != 0; i--) {
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val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M;
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if (val == AR_RTC_STATUS_ON)
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break;
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OS_DELAY(50);
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OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
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}
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bad:
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if (i == 0) {
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#ifdef AH_DEBUG
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ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
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__func__, POWER_UP_TIME/1000);
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#endif
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return AH_FALSE;
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}
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}
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OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
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return AH_TRUE;
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#undef POWER_UP_TIME
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}
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/*
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* Notify Power Mgt is disabled in self-generated frames.
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* If requested, force chip to sleep.
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*/
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static void
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ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip)
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{
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OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
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if (setChip) {
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/* Clear the RTC force wake bit to allow the mac to sleep */
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OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
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OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF);
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/* Shutdown chip. Active low */
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OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN);
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}
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}
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/*
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* Notify Power Management is enabled in self-generating
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* fames. If request, set power mode of chip to
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* auto/normal. Duration in units of 128us (1/8 TU).
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*/
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static void
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ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
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{
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OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
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if (setChip)
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OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
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}
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/*
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* Set power mgt to the requested mode, and conditionally set
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* the chip as well
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*/
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HAL_BOOL
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ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
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{
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struct ath_hal_5212 *ahp = AH5212(ah);
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#ifdef AH_DEBUG
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static const char* modes[] = {
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"AWAKE",
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"FULL-SLEEP",
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"NETWORK SLEEP",
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"UNDEFINED"
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};
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#endif
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int status = AH_TRUE;
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if (!setChip)
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return AH_TRUE;
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HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
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modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : "");
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switch (mode) {
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case HAL_PM_AWAKE:
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status = ar5416SetPowerModeAwake(ah, setChip);
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break;
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case HAL_PM_FULL_SLEEP:
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ar5416SetPowerModeSleep(ah, setChip);
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break;
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case HAL_PM_NETWORK_SLEEP:
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ar5416SetPowerModeNetworkSleep(ah, setChip);
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break;
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default:
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HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n",
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__func__, mode);
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return AH_FALSE;
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}
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ahp->ah_powerMode = mode;
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return status;
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}
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/*
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* Return the current sleep mode of the chip
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*/
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HAL_POWER_MODE
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ar5416GetPowerMode(struct ath_hal *ah)
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{
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int mode = OS_REG_READ(ah, AR_RTC_STATUS);
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switch (mode & AR_RTC_PM_STATUS_M) {
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case AR_RTC_STATUS_ON:
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case AR_RTC_STATUS_WAKEUP:
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return HAL_PM_AWAKE;
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case AR_RTC_STATUS_SLEEP:
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return HAL_PM_NETWORK_SLEEP;
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case AR_RTC_STATUS_SHUTDOWN:
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return HAL_PM_FULL_SLEEP;
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default:
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: unknown power mode, RTC_STATUS 0x%x\n",
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__func__, mode);
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return HAL_PM_UNDEFINED;
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}
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}
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